property ChildProcess.prototype.stdin
Usage in Deno
```typescript import { ChildProcess } from "node:node__child_process.d.ts"; ```A `Writable Stream` that represents the child process's `stdin`.
If a child process waits to read all of its input, the child will not continue
until this stream has been closed via `end()`.
If the child was spawned with `stdio[0]` set to anything other than `'pipe'`,
then this will be `null`.
`subprocess.stdin` is an alias for `subprocess.stdio[0]`. Both properties will
refer to the same value.
The `subprocess.stdin` property can be `null` or `undefined` if the child process could not be successfully spawned.
Writable | null